▎ 摘　　要

Graphene/hematene heterostructure is an interesting 2D van der Waals material with exciting and valuable features of both graphene and hematene. Our density functional theory calculations reveal that the resulting heterostructure preserves a long-range ferromagnetic character of pristine hematene monolayer and behaves as a half metal with 100% spin polarization unlike individual graphene and hematene monolayers which act like non-magnetic semi-metal and ferrimagnetic semiconductor, respectively. This transition to the half metal mainly arises due to charge transfer from C atoms of graphene to O atoms of hematene monolayer. These results manifest that the proposed heterostructure will attract the experimentalists highly and serve as a powerful candidate in spintronics and magnetic memory-based storage devices in near future. [GRAPHICS]